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MCQ Practice

Technological Knowledge MCQs

In quantum communication, what is a significant advantage of quantum key distribution (QKD)?

  • A. It is faster than classical encryption
  • B. Any eavesdropping attempt can be detected
  • C. It uses standard wireless frequencies
  • D. It requires no mathematics
Explanation:
QKD uses quantum states, so any interception of the state changes it, alerting the parties to eavesdropping. a

Which of the following describes a blockchain's immutability feature?

  • A. Anyone can easily alter blocks
  • B. Once recorded, blocks cannot be changed without detection
  • C. Only the first block is immutable
  • D. Transactions expire after 24 hours
Explanation:
The cryptographic linkage of blocks means that modifying any block would be evident across the network, providing immutability.

Which computing paradigm combines simulation and data analysis to create a digital representation of a physical object or system?

  • A. Digital diary
  • B. Digital twin
  • C. Virtual machine
  • D. Quantum replica
Explanation:
A digital twin is a virtual model of a physical object or system used for simulation and analysis.

Which of the following is a type of extended reality that overlays digital information onto the real world?

  • A. Virtual Reality (VR)
  • B. Augmented Reality (AR)
  • C. Artificial Reality (ARt)
  • D. Mixed Science
Explanation:
Augmented Reality overlays virtual objects onto the real world via devices such as smart glasses.

What is 6G expected to improve over 5G technology?

  • A. Slower speeds for energy savings
  • B. Terahertz frequency bands for higher data rates
  • C. Wider coverage at the expense of latency
  • D. Fewer connected devices
Explanation:
6G research focuses on using higher (terahertz) frequencies, aiming for ultrafast data rates and even lower latency.

How does edge computing differ from cloud computing?

  • A. Edge computing processes data close to the source, reducing latency
  • B. Edge computing requires no security measures
  • C. Edge computing is only for mobile devices
  • D. Edge computing uses infinite storage
Explanation:
Edge computing processes data close to the source (at the network edge), which reduces latency compared to sending everything to the cloud.

What protocol is lightweight and commonly used for machine-to-machine communication in IoT devices?

  • A. HTTP
  • B. MQTT
  • C. FTP
  • D. SSH
Explanation:
MQTT is a lightweight publish/subscribe protocol ideal for IoT sensors with low bandwidth.

Which of these is an example of an Internet of Things (IoT) device?

  • A. Smart thermostat
  • B. Mainframe computer
  • C. Gaming console
  • D. Digital camera
Explanation:
A smart thermostat with internet connectivity and sensors exemplifies an IoT device.

What does the term "quantum supremacy" refer to?

  • A. A concept in quantum entanglement
  • B. When a quantum computer solves a problem, classical computers cannot feasibly solve
  • C. Quantum computers surpassing general AI
  • D. Complete failure of quantum error correction
Explanation:
Quantum supremacy is when a quantum computer outperforms the best classical supercomputers on a particular task.

Which algorithm allows quantum computers to factor large numbers efficiently, threatening RSA encryption?

  • A. Shor's algorithm
  • B. Dijkstra's algorithm
  • C. FFT algorithm
  • D. Quicksort
Explanation:
Shor's algorithm can factor integers in polynomial time, which could break RSA keys.